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目的探讨应用雪橇式前方牵引口内装置,口外面罩牵引,治疗替牙期安氏Ⅲ类错的疗效。方法 18例替牙期安氏Ⅲ类错患者,应用雪橇式口内固定装置进行上颌前方牵引治疗,对治疗前后X线头影测量结果进行分析。结果前牙覆盖治疗后为(2.2±0.8)mm,A点至OLP的距离治疗后为(71.3±3.1)mm,下颌平面与SN平面夹角治疗后为(33.3±3.1)°,上下颌骨间位置关系明显改善。结论雪橇式前方牵引器口内固位装置制作简单、固位良好、患者戴用舒适,可明显改善可有效改善Ⅲ类错患者侧貌外形。
Objective To evaluate the curative effect of sled type front traction intraoral device and oral mask on the treatment of Class Ⅲ malocclusion during dentition. Methods 18 cases of malocclusion of Angle Class Ⅲ malocclusion were treated with the sled-type internal fixation device in front of maxillary traction. The results of X-cephalometry before and after treatment were analyzed. Results The distance from the point A to the OLP was (71.3 ± 3.1) mm after treatment and the angle between the mandibular plane and the SN plane was (33.3 ± 3.1) ° after treatment. The maxillary and mandible Significant improvement in the positional relationship between. Conclusion Sled front traction device intraoral retention device is simple, well-retained, patients wearing comfortable, can significantly improve the profile can effectively improve the profile of patients with type III malformations.